Further Investigations of Ice-Proximal Sedimentation Processes, Glacier Bay, Alaska

阿拉斯加冰川湾近冰沉积过程的进一步研究

• 批准号: 8618789
• 负责人: Norman Smith
• 金额: $ 3.96万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-15 至 1989-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8618789&HistoricalAwards=false
• 关键词: Further; Investigations; Ice; Proximal; Sedimentation

This award is in support of continued study of sediment deposition processes in Glacier Bay, Alaska, near the termini of tidewater glaciers (It is a companion proposal to DPP-8619153, submitted by Dr. Ross Powell). During the past two years these processes have been investigated near the termini of Riggs and McBride Glaciers. The study will now be extended to: (1) McMuir Glacier, a tidewater glacier similar to McBride but fronting a less restricted basin, where the distribution and origin of fine laminated sediments as well as sedimentation raters versus distance from the glacier will be investigated; (2) Wachusett Basin, a restricted basin, a restricted basin fronting Carroll Glacier where the production and distribution of bergstone diamicton (a sediment type) will be studied, and (3) Wachusett Delta, where hypotheses developed from the study of Riggs glacier regarding sediment storage and release will be tested. A field laboratory will permit rapid on-site processing of water and sediment traps samples. An understanding of modern glaciomarine sedimentation is essential for interpretation of deposits left by the Pleistocene ice sheets, which are now recognized to have been extensively grounded below sea level. Dr. Norman Smith and his colleague Dr. Ross Powell are well-known for their work on this problem in Glacier Bay.

该奖项支持对阿拉斯加冰川湾靠近潮水冰川终点的沉积物沉积过程的持续研究（这是罗斯·鲍威尔博士提交的 DPP-8619153 的配套提案）。 在过去的两年里，人们在里格斯冰川和麦克布莱德冰川终点附近对这些过程进行了调查。 该研究现在将扩展到：（1）麦克缪尔冰川，一个类似于麦克布莱德的潮水冰川，但面向一个限制较少的盆地，将调查细层状沉积物的分布和起源以及沉积速率与距冰川距离的关系； (2) 沃楚西特盆地，一个限制性盆地，一个面向卡罗尔冰川的限制性盆地，将研究山石积石（一种沉积物类型）的生产和分布，以及 (3) 沃楚西特三角洲，根据里格斯冰川的研究提出假设将测试沉积物的储存和释放。 现场实验室将允许对水和沉积物陷阱样品进行快速现场处理。 了解现代冰川沉积作用对于解释更新世冰盖留下的沉积物至关重要，现在人们认识到这些冰盖已广泛接地于海平面以下。 诺曼·史密斯博士和他的同事罗斯·鲍威尔博士因在冰川湾解决这一问题而闻名。